Q$\mathrm{.}2$: The library information system is described below: A book can be issued to only one borrower but a borrower can borrow multiple number of books. Borrower is a person who is authorized to borrow books from the library for a specific number of days. Each borrower must have a membership id$,$ name, contact number and address. When a book is issued some information such as issue date, book id$,$ borrower id$,$ length of period for issue and return due date are needed to enter in to the database. At the same the borrowed book should be labeled as issued and will be cleared after return by the borrower. After return of the book, it can be issued to another borrower. So a book is borrowed by multiple borrowers in different times.